Newbie trying to set up Megawatt for charging

Need to check that battery wiring

if series they are 'end to end' backwards

or in parallel even backwards

but even if parallel properly for 6v, they make a low resistance short to megawatt
14v trying to charge 6v

I have thought about this, but the lights in the camper and everything else 12 volts works.

I have pos+ to Neg+ connected together of the two batteries and then pos+ from camper to pos+ battery terminal, same for Neg.

I also show 13 volts inside camper according to my Trimetric and solar charge controller.


I am going to check things over in the morning in the light of day. I was hoping to leave for Mexico on monday.